I have the same issue on fedora
INFO: cc -L/work/fredrikb/julia7/bin/../lib -shared -ljulia -o /work/fredrikb/julia7/lib/julia/sys.so /work/fredrikb/julia7/lib/julia/sys.o
INFO: System image successfully built at /work/fredrikb/julia7/lib/julia/sys.so
INFO: Julia will automatically load this system image at next startup.
bash ~> julia7
ERROR: System image file failed consistency check: maybe opened the wrong version?
bash ~> julia7 -J /work/fredrikb/julia7/lib/julia/sys.so
ERROR: System image file failed consistency check: maybe opened the wrong version?